How many milligrams of calcium are there if you have 1.05 x 1022 atoms

A sample of gas in which [h2s] = 5.76 m is heated to 1400 k in a sealed vessel. after chemical equilibrium has been achieved, what is the value of [h2s]? assume no h2 or s2 was present in the original sample.

You want to minimize an objects thermal energy loss on a cold day. How does heat energy transfer affect thermal energy loss?

Avogadro defined one mole of carbon-12 atoms to have a mass of exactly 12.0 grams. Calculate the number of hydrogen atoms in 1 mole. A) 1.38 x 1025 atoms B) 1.66 x 1024 atoms C) 3.98 x 1023 atoms D) 6.02 x 1023 atoms

The following statements pertain to the development of the theory of combustion by the French chemist Lavoisier in theeighteenth century.

10. What is the velocity of a wave with a frequency of 6 Hz and a wavelength of 2 m?

If 294 grams of FeS2 is allowed ti react with 176 grams of O2 according to the following equation how many grams of Fe2O3 are produced? FeS2 + O2 = Fe2O3 + SO2

Convert 3.57 moles of aluminum to grams

An average microwave uses a frequency of 2.54 GHz. How much energy is emitted?

Why scientist form a hypothesis

Step two of the procedure states: "Using sterile technique, place a loopful of inoculum from the M. luteus culture in the drop of nigrosin and mix." Which of the procedures qualifies as sterile technique?